Graphite moli



UNITED- STATES PKATENTO oFF1c JEAN H. L. DE Bars, or srormmm, MASSACHUSETTS, AssIoNon. 130 NEW rnoons's METALS CORPORATION, OF WILMINGTON, DELAWARE, 'A COR,POBATION OF DELA- wane.

No Drawing.

'1 '0 all whom it may concern:

Be it known that I, JEAN H. L, DE' BATS, a subject of the Kingdom of the Netherlands, residing at Stoneham, county of Middlesex, Commonwealth of Massachusetts,

have invented certain' new and useful Improvements in Graphite Molds, of which the following is a specification.-

My invention consists in a mold adapted for use incasting metals. Molds have heretofore been made of various-materials, including powdered graphite and a combination of graphite and clay. None of such molds, in practice, are found suitable for v casting metals at high temperatures, owing .to the fact that they usually decompose,- .break down, or set free gases and bodies whichare absorbed by the metal cast.

My improved mold is not open to the 0b'-. jections'above stated. To produce my mold, I take pure flaked graphite and compress-it to the shape desired in a suitable metal mold. The pressure used should ,be as great as may be conveniently applied; the greater the pressure the better the mold. In prac-" GRAPHITE MOLI Specification of Letters Patent. -1 atented Nov. 16, 1920; Application filed IuIy BO, 1919; Serial No. 314,862.

tice I have used a pressures of from one to two tons, with success. After the graphite mold has been made, it is removed from the metal inold and is then ready 'to receive the metal to be cast. I have cast into said mold high speed steel, copper, nickel, glass, and

'VEIIOIIS combinations of metals and other bodies cast in ordinary molds.

4 Having thus described my. invention, 1 claim:

graphite.

1. A'mold formed of compressed flaked v 2. A mold formed of flaked graphite con:

solidat ed by the exhibition of high pressure.

3. A mold formed of graphite which may be consolidated to form a, homogeneous structure without intervening spaces.

In testimonywhereof, I afiix my signatur'eQ JEAN H. L. BATS. 

